30-12-2020, 02:04 AM
For the same c.r is the 9E inferior? The step around the inlet valve perimeter sems curiously placed.
The 18mm heads were remarkably resistant to oiling. At one stage my car burned about a pint ih 40 miles of hot main road running. After a long descent, following traffic was competely obliterated but never missed. A 1937 head burning about a pint in 300 miles and on leaded petrol would sometimes miss one or two beats on pick up. Did not experiment with plugs.
The 18mm heads were remarkably resistant to oiling. At one stage my car burned about a pint ih 40 miles of hot main road running. After a long descent, following traffic was competely obliterated but never missed. A 1937 head burning about a pint in 300 miles and on leaded petrol would sometimes miss one or two beats on pick up. Did not experiment with plugs.